<body></body>
body{
  width:100%;
  height:100vh;
  background: linear-gradient(45deg, white 25%,
    #E9D8BA 25%, #E9D8BA 50%, 
    white 50%, white 75%, 
    #E9D8BA 75%);
background-size:100px 100px;
  -webkit-box-shadow:inset 0 0 20px 2px #333;
box-shadow:inset 0 0 200px 2px #333;
}
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